Sibyl Cockburn Peerage person ID=577249 (1544–1620) Parents Alison Sandilands John Cockburn of Ormiston Children William St. Clair George St. Clair Sir John St. Clair of Hermanstoun Mary St. Clair Siblings Janet Cockburn Barbara Cockburn Alexander Cockburn Sir John Cockburn of Ormiston Samuel Cockburn Alison Cockburn Partners John Cockburn of Clerkington Sir William St. Clair of Hermanstoun